JNI_QUICK_ENTRY(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value))

  {- -------------------------------------------
  (1) (デバッグ用の処理)
      (See: JNIWrapper)
      ---------------------------------------- -}

      JNIWrapper("SetObjectField");

  {- -------------------------------------------
  (1) (DTrace のフック点)
      ---------------------------------------- -}

      DTRACE_PROBE4(hotspot_jni, SetObjectField__entry, env, obj, fieldID, value);

  {- -------------------------------------------
  (1) (変数宣言など)
      ---------------------------------------- -}

      oop o = JNIHandles::resolve_non_null(obj);
      klassOop k = o->klass();
      int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);

  {- -------------------------------------------
  (1) (JVMTI のフック点)
      ---------------------------------------- -}

      // Keep JVMTI addition small and only check enabled flag here.
      // jni_SetField_probe_nh() assumes that is not okay to create handles
      // and creates a ResetNoHandleMark.
      if (JvmtiExport::should_post_field_modification()) {
        jvalue field_value;
        field_value.l = value;
        o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, 'L', (jvalue *)&field_value);
      }

  {- -------------------------------------------
  (1) oopDesc::obj_field_put() を呼んで, フィールドに値を書き込む.
      ---------------------------------------- -}

      o->obj_field_put(offset, JNIHandles::resolve(value));

  {- -------------------------------------------
  (1) (DTrace のフック点)
      ---------------------------------------- -}

      DTRACE_PROBE(hotspot_jni, SetObjectField__return);
    JNI_END